Convert bar to psi
1 bar = 14.5037738 psi
Bar is the usual pressure unit in Europe (gauges, compressors), psi the usual unit in the US and UK (tires, hydraulics). This page converts directly between the two, with the exact factor used shown below the result.
1 Bar = 14.50377377 Pound per square inch (psi)
Raw value: 14.5038
Scientific dossier
What the tool computes, what it assumes, where it stops being valid, and where its data comes from.
Method & formulas1 bar = 14.5037738 psi
1 bar = 14.5037738 psi
1 psi ≈ 0.0689476 bar
Psi (pound-force per square inch) derives from two imperial units that are exact by definition (the pound-force and the inch): the factor above is therefore not a measured rounding but an exact conversion, computed by the same unit engine as the rest of the site.
- Bar
- · the usual pressure unit in Europe, 1 bar = 100,000 pascals exactly.
- Psi
- · pound-force per square inch, the usual pressure unit in the US and UK.
Validity domainThis conversion covers pressure as a physical unit (absolute pressure).
This conversion covers pressure as a physical unit (absolute pressure). In practice, a tire gauge or a compressor usually shows gauge pressure, i.e. relative to atmospheric pressure: the conversion factor stays the same, but make sure you're comparing two values expressed with the same convention (both gauge, or both absolute) before trusting the result.
Why this conversion comes up oftenA European gauge reads in bar, an American datasheet or tire placard reads in psi.
A European gauge reads in bar, an American datasheet or tire placard reads in psi. The conversion comes up in automotive work (tire pressure), industrial hydraulics and pneumatics, and diving (tank gauges).
Example: car tire pressureA recommended tire pressure of 2.
A recommended tire pressure of 2.3 bar is about 33.4 psi (2.3 × 14.5037738 ≈ 33.4), a typical value shown on American pressure gauges.